The reports of the demise of the test cube are, perhaps, premature. I've read people saying that new firmwares and versions of Skeinforge make test cubes unnecessary, but I'm not buying it just yet. To be sure, one can get a lot closer to a usable print quickly, but there's still plenty of room to screw things up.
I don't know why I keep all the old junk. Maybe to keep my humble. Maybe I hope for a recycling option in the future. Still, in a weird way, I like to see how far I've come and what I've learned from all this fail.